Make sure your kernel build .config file contains the line:
# CONFIG_INET_ECN is not set
not
CONFIG_INET_ECN=y
Here's what the kernel configuration help has to say:
Explicit Congestion Notification (ECN) allows routers to notify
clients about network congestion, resulting in fewer dropped packets
and increased network performance. This option adds ECN support to the
Linux kernel, as well as a sysctl (/proc/sys/net/ipv4/tcp_ecn) which
allows ECN support to be disabled at runtime.
Note that, on the Internet, there are many broken firewalls which
refuse connections from ECN-enabled machines, and it may be a while
before these firewalls are fixed. Until then, to access a site behind
such a firewall (some of which are major sites, at the time of this
writing) you will have to disable this option, either by saying N now
or by using the sysctl.
Shawn Starr wrote:
>
> Here's something strange that i've been noticing with 2.4.0. Some websites I am
> unable to access now. For example:
>
> http://www.scotiabank.ca/simplify/index.html
<snip>
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